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UNITED STATES PATENT. Germs..

FLORENTINE A. JONES, OF MALDEN, MASSACHUSETTS.

SPECIFICATION forming part of Letters Patent No. 360,887, dated April12, 1887.

Application filed June 16, 1886.

To all whom it may concern:

Be it known that I, FLORENTINE A. J owes, a citizen of the UnitedStates, residing at Maiden, in the .county of Middlesex and State ofMassachusetts, have invented certain new and useful Improvements inSteam-Boiler. or

passed over and beyond the fuel and beyond the bridge-wall or partitionwhich defines that portion of the furnace underneath the grate; and itfurther consists in the introduction of air or steam, or both, at acertain point or points, whereby I obtain a more thorough intermixing ofthis supplementary supply of air and steam with the gaseous products ofcombustion than has heretofore been achieved, and in consequence a moreperfect and eco: nomical combustion of the fuel; and I accomplish thisresult by means of an obstruction, preferably in the form of a hangingwall perforated, substantially as shown, and which is placed a properdistance beyond the bed of fuel and its attendant bridge-wall (socalled) in the usual coal burning steam-boiler furnace shown in thedrawings; but in furnaces not employing a bridge-wall the end of the bedof fuel or a substitute for the bridge-wall may be used, in order thatthe products of combustion may be deflected and made to pass under thelower edge or bottom side of said wall or obstruction. V

It may be prdper to say that I make use of a hanging wall, and show suchin the drawings, because I considerit preferable to a wall supportedfrom the under side; but it will be understood that such a wall, or oneof iron or any proper substitute of any suitable form, in place of thehanging wall shown, would come within the scope of this invention.

I am aware that both air and steam have been supplementarily admitted tofurnaces at different points and in different manners; but

Serial No. 205,353. (No model.)

I am not aware of its having been done in the. manner, or, moreparticularly, under the con ditions, that I have herein set forth, andby which I am enabled to achieve a result hitherto unattained.

In the accompanying drawings, in which similar letters of referenceindicate like parts, the for-in of boiler shown is the usual form oftubular boiler and setting, wherein heat is applied to the outside ofthe shell on the under side, the fire-box. being situated under thefront end of the boiler, and the heat and products of combustion passingto the rear of the boiler, then returning to the front through a seriesof tubes which traverse the boiler longitudinally, and pass off throughthe uptake and flue into the chimney.

Figure l is a longitudinal vertical section of a boiler and furnace.showing my improvements therein. Fig. 2 is a longitudinal verticalsection of a boiler and furnace, showing my improvements therein. Fig. 3is a cross section of Fig. 2 on line x 00, showing passages g for theadmission of air into the bridge-wall D. Fig-4 is a cross-section ofFig. 2 on line 2 2, showing passages b for the ad mission of air intothe hanging wall E. Fig. 5 is a longitudinal vertical section of aboiler and furnace embodying my improvements, showing perforations orpassages c a through the top and s 8 through the rear side of thebridge-wall, with the hanging wall E, provided with perforations 0 'v onthe under side and r r on thefront or draft-opposing side. Fig. 6' isalongitudinal vertical section of a boiler-furnace embodying myimprovements and showing two hanging walls, E and N, with asteam-pipe,y, connectingwith the wall N, which is perforated at o 'v and r 1'. Fig.7 is a longitudinal vertical section of a boiler-furnace, showing thedeflecting-wall E placed farther in the rear of the bridge-wall andsupplied with heated air and superheated steam by the flue e and pipe 3Fig. 8 is a cross-section of Fig. 7 on line :0 :0, showing pipe 3/arranged to superheat steam and its connection with the hotair flue c.

F represents the boiler, f f f the tubes, and A the setting orbrick-work; i, the door to the fire-chamber, and Z the door to theash-pit. B is the ash-pit; a, the grate-surface; G, thefire- ICOchamber; D, the bridge-wall; K, the combustion-chamber; I, an inclinedwall, and L the filling. G is the uptake or flue, and H the chimney.

In the drawings showing the bridge-wall provided with the air-chamberp,passages for the entrance of air are shown at g in Fig. 3.

E is a hanging wall or obstruction placed in the rear of the bed of fuelat any convenient point, and provided with a hollow space or chamber, P,and perforations 'v I) through the bottom or lower side, and in Fig. 5the wall E is shown with additional perforations, r r, on the front orside opposing the draft, while in the same figure the bridge-wall willbe seenprovided with perforations in the rear at s s and on the top at c0, these perforations connecting with the chamber 1) in said wall. Theconnection of the chamber 1? in the wall E with air-supplying passagesis shown in Fig. 4 at b.

In Figs. 6, 7, and 8, where a deflecting-wall is shown at or near therear end of thcboilcr, it will be seen special means have been taken forthe admission of heated air or steam, or both and Fig.8 shows how steammay be superheated.

The operation of my improved furnace is as follows: The products ofcombustion arising from the fuel on the grates a in the fire-chamher 0pass with the draft over the bridge-wall D, and are arrested and made topass under the lower side of the hanging wall E, where they come incontact with air or steam coming through the perforations v 'v in thelower side of said wall E, and passing through the combustion-chamber Kto the rear of the boiler F, and thence through the tubes fff into theflue or uptake G into the chimney H.

It will be observed that in perforating the retardingwall E on its underside the products of combustion are forcibly made to pass in contactwith the air coming through the perforations o o, and its importancewill be readily understood.

The supply of air to the chamber P in the wall E should be greater thancan pass through the perforations, which should be so constructed as todischarge at a certain angle downward and outward on the draft-opposingside, or a longitudinal separation may be put in the chamber 1, betweenthe side perforations and the bottom perforations, to prevent thecombusti ble products from passing through the wall E, which would becontrary to the spirit of this invention. It is also well to incline thebottom perforations of wall E slightly to the rear, as they dischargefreer and keep open better.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is

1. In combination with a furnace, a hollow deflecting-wall provided withperforations extending from the interior outward through the under face,said wall being situated on a line parallel with the rear face of thebridge-wall and to the rear of an open space behind the bridge-wall andadapted to arrest and deflect the products of combustion downward andunderneath the lower face of said hollow wall after they have passedover and beyond the bridgewall, substantially as and for the purpose setforth.

2. In combination with a furnace, a hollow deflecting-wall provided withperforations extending from the interior outward through the under faceand with perforations extending from the interior of said wall outwardthrough the side opposing the draft, said wall being situated on a lineparallel with the rear face of the bridge-wall and to the rear of anopen space behind the bridge-wall and adapted to arrest and deflect theproducts of combustion downward and underneath the lower face of saidhollow wall after they have passed over and beyond the bridge-wall,substantially as and for the purpose set forth.

3. In combination with a furnace, a hollow deflecting wall or wallsprovided with perforations extending from the interior outward throughthe under face and with perforations extending from the i nterior ofsaid wall or walls outward through the side opposing the draft, saidwall or walls being situated on a line parallel with the rear face ofthe bridge-wall and to the rear of an open space behind the bridgewall,and adapted to arrest and deflect the products of combustion downwardand underneath the lower face of said hollow wall or walls after theyhave passed over and beyond the bridge-wall, substantially as and forthe purpose set forth.

FLORENTINE A. JONES. \Vitnesses:

M. W. FRo'rrnNonAir, JOHN F. WAKEFIELD.

